Orange vat-dye.



I To all whom it may concern: v Be it. knownthatl, Josi-zril-Di-nNn'r, citiand caustic soda lye from orange to red berfeld, Germany,

.Ctlll UNITED STATES "PATENT OFFICE.

JOSEPH DEINET, or ELBERFEPD, GERMAN&, ASSIGNOB. T 'FAR N'FAZBRIKEN vonm. Famine. BAYER a; 00., 0F ELBERFELD, GERMANY, A coRPoIwrIoN or GERMANY.

ORANGE VAT- DYE.

Specification or Iietters Patent. Patented )[ay 3, 1910.

No Drawing. Application filed May 12, 1 909,Seria1 No. 495449. Reirewed March 18; 1910. seriarno.

zen of the German Empire, residingat 'Elhave invented new "and useful Improvements in Vat Coloringdtlat ter, of which the following is a smecification.

My invention relates to theproduction of new anthracene derivatives. tained by converting a triaminoanthraquinone into its tribenzoylated ,derivativm The reaction is carried out by treating a triaminoanthraquinone with benzoyl ehlorid. I The new products are after be ng dried and pulverized colored owders practically insoluble in water, solu 10 in concentrated sulfuric acid with from a yellow to red color. 'lhe yield on treatment with luydrosultite vats suitable for dyeing and printing the textile fiber from yellow to 'red to brown shades. They; also form valuable lakes.

In u'der to illustratethe new process I Proceed as follows, the parts being by weig HIP-l0 parts of 1.2.44rialninoanthraquinone arelieateddo boiling for about half a 1 hour with 100 parts of nitrobenzene and 0 parts of benzoyl chlorid. The new condensation product crystallizes from the cool ing liquid in the shape or-orange crystals which are filtered ott'and dried. It is soluble-inpyridiii with an orange yellow color,

in concentrated sulfuric acid with a. dull orange color. By treatment wit-h hydrosulfite and Na()l-l an orange-red vat is obtained which dyes cotton, woolor silk pure orange shades.

They are ob Other. t-riaminoanthraquinones may be 'used 6. g. the -'lxtzfi-triaminoauthraquincme d es red l claim z- L The herein-described new vat dyestuffs of the anthracene'series which can be ob-' tainedfrom benzoyl ehlorid and a triaminotihthraquinone, whose dyestuffs are, after beiugdrie'd and pulverized, colored powders practicallyinsoluble in water, soluble in eoncentratedsulfuric acid with a. yellow to red color; giving from orange .to red vats with hydrosulfite and caustic soda lye, which vats dye thetextile fiber front, yellow to red shades, substantially as described.

2. The herein-describednew vat dyest'ntf of the anthracene series which is the 12:4- tribenzoyltriaminoantl 'aquin'qne, which dyestutl' is, after bein r dried and pulverized, an orange powderwiiich is soluble in pyridin with an orange-yellow colorysoluble in concentmted sulfuric acid with a dull orangered color; giving an orange-red vat with hydrosultite and canstie soda lye, which vat dyes the tex-tile'fiber orange singles, substantially'as described.

In testimony whereof I have herelmto set my handin .theqiresence of two subscribing witnesses.

Witnesses O'r o KUNIG, 1 V C. J. lliuon'r. 

